ASP Street Defender OC Inserts, Pepper Spray Refill, Replacement Cartidge, Test (Twin Pack) Safety- inserts are readily replaceable, Laser engraved expiration date coded to assure reliability Activation- Precision spring valve, Horizontal discharge, Cone-shaped dispersion Body- worlds smallest aerosol cans, Seamless aluminum, Impact extruded, Extra-long ferrule, Gasket sealed Heat Insert- Oleoresin Capsicum, 2 Million Scoville Heat Units, 10% formulation, Optional custom formulations Street Defender Inserts- 13 grams; Thirty one-half second bursts; Effective range ten feet